package servlet.XMLTree;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import offer.GetDataSource;
import offer.GetNodeFromModule;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import com.netscenery.yang.model.*;

public class RenameNodeServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public RenameNodeServlet() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
		out
				.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
		out.println("<HTML>");
		out.println("  <HEAD><TITLE>A Servlet</TITLE></HEAD>");
		out.println("  <BODY>");
		out.print("    This is ");
		out.print(this.getClass());
		out.println(", using the POST method");
		out.println("  </BODY>");
		out.println("</HTML>");
		out.flush();
		out.close();
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		response.setContentType("text/xml; charset=utf-8");
		request.setCharacterEncoding("utf-8");
		response.setHeader("Cache-Control","no-cache"); 
		PrintWriter  out = response.getWriter();
		String newName   = request.getParameter("newName");
		String nodeLevel = request.getParameter("nodeLevel");
		String[]  levers =  nodeLevel.split("\\\\");
		Module    module = GetDataSource.getDataRead(request);
		Object   curNode = null;                             //��¼��ǰ�Ҽ����ڽ��
		curNode = GetNodeFromModule.getItemNode(module,levers);  //��ȡ��ǰ�Ҽ����ڽ��
		Method setName          = null;
		Method hasDuplicateNode = null;
		try {
			setName   = curNode.getClass().getMethod("setName",String.class);
			hasDuplicateNode = curNode.getClass().getMethod("hasDuplicateNode",String.class);
		} catch (NoSuchMethodException e) {
			e.printStackTrace();
		} catch (SecurityException e) {
			e.printStackTrace();
		}
		
		String msg = "Success";
		try {
			Object element = hasDuplicateNode.invoke(curNode,newName);
			String nodeIdstr = null;
			if(null != element){
				if(element instanceof Node){
					String path = "Note"+((Node)element).getPath();
					nodeIdstr = path.replaceAll("/", "\\\\");
					msg = nodeIdstr;
				}else{
					msg = "ModelElement@"+element.getClass().getSimpleName()+"@"+((ModelElement)element).getName();
				}
				
			}else{
				setName.invoke(curNode, newName);
			}
		} catch (IllegalAccessException e) {
			e.printStackTrace();
		} catch (IllegalArgumentException e) {
			e.printStackTrace();
		} catch (InvocationTargetException e) {
			e.printStackTrace();
		}
		GetDataSource.getDataWrite(request, module);
		out.write(msg);
		out.flush();
		out.close();
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
